Influence of Feed Form on Gizzard Morphology and Particle Size Spectra of Duodenal Digesta in Broiler Chickens
We examined gizzard morphology and diet particle size reduction in broiler chickens fed a wheat-based diet that was offered in either a mash or a pelleted form. The pelleted diet had a lower proportion of coarse particles on wet sieving. Birds fed the mash diet had a significantly larger gizzard m...
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| Format: | Article |
| Language: | English |
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Japan Poultry Science Association
2007-05-01
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| Series: | The Journal of Poultry Science |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/jpsa/44/2/44_2_175/_pdf/-char/en |
| _version_ | 1797816240876552192 |
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| author | Ahmed M. Amerah Roger G. Lentle Velmurugu Ravindran |
| author_facet | Ahmed M. Amerah Roger G. Lentle Velmurugu Ravindran |
| author_sort | Ahmed M. Amerah |
| collection | DOAJ |
| description | We examined gizzard morphology and diet particle size reduction in broiler chickens fed a wheat-based diet that was offered in either a mash or a pelleted form. The pelleted diet had a lower proportion of coarse particles on wet sieving. Birds fed the mash diet had a significantly larger gizzard mass per unit body mass. The gizzards of all birds increased uniformly in size, there being no significant change either in the ratio of content to empty mass or in the ratio of gizzard length to breadth with diet. Thus, there was no tendency for coarse particles to accumulate in the gizzards of bird fed the mash diet. The relative proportion of all classes of particles below 0.500mm was increased and the relative proportion of all particle classes above 0.500mm was reduced in birds regardless of feed form. The relative increase of particles in all classes below 0.500mm was greater in birds fed mash feed. However, digesta exiting the gizzard of birds fed mash diet contained significantly greater amounts of particles of size classes 1mm and greater than digesta of those fed the pelleted diet. Thus, whilst the gizzard operates to generally reduce particle sizes above 0.500mm and increase those below this size, this reduction is not uniform and likely to be a probabilistic function as it is in the human mouth. |
| first_indexed | 2024-03-13T08:34:48Z |
| format | Article |
| id | doaj.art-3a774778297b454ea2307a5f61822707 |
| institution | Directory Open Access Journal |
| issn | 1346-7395 1349-0486 |
| language | English |
| last_indexed | 2024-03-13T08:34:48Z |
| publishDate | 2007-05-01 |
| publisher | Japan Poultry Science Association |
| record_format | Article |
| series | The Journal of Poultry Science |
| spelling | doaj.art-3a774778297b454ea2307a5f618227072023-05-31T00:24:54ZengJapan Poultry Science AssociationThe Journal of Poultry Science1346-73951349-04862007-05-0144217518110.2141/jpsa.44.175jpsaInfluence of Feed Form on Gizzard Morphology and Particle Size Spectra of Duodenal Digesta in Broiler ChickensAhmed M. Amerah0Roger G. Lentle1Velmurugu Ravindran2Institute of Food, Nutrition and Human Health, Massey UniversityInstitute of Food, Nutrition and Human Health, Massey UniversityInstitute of Food, Nutrition and Human Health, Massey UniversityWe examined gizzard morphology and diet particle size reduction in broiler chickens fed a wheat-based diet that was offered in either a mash or a pelleted form. The pelleted diet had a lower proportion of coarse particles on wet sieving. Birds fed the mash diet had a significantly larger gizzard mass per unit body mass. The gizzards of all birds increased uniformly in size, there being no significant change either in the ratio of content to empty mass or in the ratio of gizzard length to breadth with diet. Thus, there was no tendency for coarse particles to accumulate in the gizzards of bird fed the mash diet. The relative proportion of all classes of particles below 0.500mm was increased and the relative proportion of all particle classes above 0.500mm was reduced in birds regardless of feed form. The relative increase of particles in all classes below 0.500mm was greater in birds fed mash feed. However, digesta exiting the gizzard of birds fed mash diet contained significantly greater amounts of particles of size classes 1mm and greater than digesta of those fed the pelleted diet. Thus, whilst the gizzard operates to generally reduce particle sizes above 0.500mm and increase those below this size, this reduction is not uniform and likely to be a probabilistic function as it is in the human mouth.https://www.jstage.jst.go.jp/article/jpsa/44/2/44_2_175/_pdf/-char/enfeed formwheatparticle sizegizzard morphologybroiler chickens |
| spellingShingle | Ahmed M. Amerah Roger G. Lentle Velmurugu Ravindran Influence of Feed Form on Gizzard Morphology and Particle Size Spectra of Duodenal Digesta in Broiler Chickens The Journal of Poultry Science feed form wheat particle size gizzard morphology broiler chickens |
| title | Influence of Feed Form on Gizzard Morphology and Particle Size Spectra of Duodenal Digesta in Broiler Chickens |
| title_full | Influence of Feed Form on Gizzard Morphology and Particle Size Spectra of Duodenal Digesta in Broiler Chickens |
| title_fullStr | Influence of Feed Form on Gizzard Morphology and Particle Size Spectra of Duodenal Digesta in Broiler Chickens |
| title_full_unstemmed | Influence of Feed Form on Gizzard Morphology and Particle Size Spectra of Duodenal Digesta in Broiler Chickens |
| title_short | Influence of Feed Form on Gizzard Morphology and Particle Size Spectra of Duodenal Digesta in Broiler Chickens |
| title_sort | influence of feed form on gizzard morphology and particle size spectra of duodenal digesta in broiler chickens |
| topic | feed form wheat particle size gizzard morphology broiler chickens |
| url | https://www.jstage.jst.go.jp/article/jpsa/44/2/44_2_175/_pdf/-char/en |
| work_keys_str_mv | AT ahmedmamerah influenceoffeedformongizzardmorphologyandparticlesizespectraofduodenaldigestainbroilerchickens AT rogerglentle influenceoffeedformongizzardmorphologyandparticlesizespectraofduodenaldigestainbroilerchickens AT velmuruguravindran influenceoffeedformongizzardmorphologyandparticlesizespectraofduodenaldigestainbroilerchickens |